Messages in this thread Patch in this message | | | From | Tvrtko Ursulin <> | Subject | [RFC 4/5] perf Documentation: Document the per PMU perf_event_paranoid interface | Date | Wed, 19 Sep 2018 13:27:50 +0100 |
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From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Explain behaviour of the new control knob along side the existing perf event documentation.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: linux-kernel@vger.kernel.org Cc: x86@kernel.org --- .../testing/sysfs-bus-event_source-devices-events | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 505f080d20a1..b3096ae9be6f 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -92,3 +92,17 @@ Description: Perf event scaling factors This is provided to avoid performing floating point arithmetic in the kernel. + +What: /sys/bus/event_source/devices/<pmu>/perf_event_paranoid +Date: 2018/06/26 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: Per PMU access control file + + This is the per PMU version of the perf_event_paranoid sysctl + which allows controlling the access control level for each + individual PMU. + + Writes to the sysctl will propagate to all PMU providers. + + For explanation of supported values please consult the sysctl + documentation. -- 2.17.1
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